MTS Multipurpose Simulated - Manual (Page 68)

Crack Length, Min/Max K, Load by Cycles Table
The Crack Length, Min/Max K, Load by Cycles table provides values for the cycles in the FCG Cycle Array
column. Additional default columns are:
• FCG Crack Size Array (not used for FCG DCPD analysis)
• FCG K Maximum (not used for FCG DCPD analysis)
• FCG K Minimum (not used for FCG DCPD analysis)
• FCG P Max Array (not used for FCG DCPD analysis)
• FCG P Min Array (not used for FCG DCPD analysis)
• FCG COD Voltage Active Array
• FCG Crack Voltage Reference Array
Validity Results Table
The Validity Results table includes the Display Name, Value, Modified Indicator, Original Value, and Calculation.
The Display Name includes the validity criteria. The Value and Original Value columns contain indicators that
are Yes or No values. The validity of the test results can change because of changes in test values.
da/dN, Delta K by Cycles Table
The da/dN, Delta K by Cycles Table lists all data points collected in the Fatigue Crack Growth da/dN array.
If no valid points are collected, an error may occur. If data is reduced using the Secant fit method, two valid
points are required or an error may occur. If data is reduced using the Polynomial fit method, an error may
occur if the number of valid points is less than the two times the polynomial fit number plus 1. The number
of valid points is used to calculate the Apparent Delta-K Threshold. Invalid data points are not used in
calculations.
The Apparent Threshold calculation can fail:
• The da/DN-Delta K data is not available.
• The Least Square Fit limits are outside the range of the da/dN-Delta K data points.
• The Least Square Fit limits range is a number of valid da/dN-Delta K data points less than two times the
polynomial fit number plus 1.
Crack Length, Min/Max K, Load by Cycles Table
The Crack Length, Min/Max K, Load by Cycles table provides values for the cycles in the FCG Cycle Array
column. Additional default columns are:
• FCG Crack Size Array
• FCG K Maximum
• FCG K Minimum
• FCG P Max Array
• FCG P Min Array
• FCG COD Voltage Active Array
• FCG Crack Voltage Reference Array
68 MTS TestSuite
5.0 Running Simulation Tests